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7 - 2 Linear Equations with Two to Six Unknowns
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k Solving Linear Equations with Three Unknowns
Example To solve the following linear equations for x, y, and z:
4x + y –2z=–1
x+6y+3z=1
–5x +4y+ z =–7
1. While in the Linear Equation Mode (SIML), press 2 (3), because the linear
equations being solved have three unknowns.
2. Input each coefficient.
ewbw-cw-bw
bwgwdwbw
-fwewbw-hw
Each time you press w, the input value is registered in the highlighted cell.
Each press of w inputs values in the following sequence:
coefficient a1 → coefficient b1 → coefficient c1 → coefficient d1 →
coefficient an → coefficient bn → coefficient cn → coefficient dn (n = 2 to 6)
• You can input fractions and value memory contents as coefficients.
3. After inputting the coefficients, solve the equations.
1(SOLV)
Coefficient input cells
Value being input into highlighted cell
1 23456
123456
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Highlighted solution cell value